CS1: how will they do? How can we help? A decade of research and practice

ABSTRACT

Background and Context: Computer Science attrition rates (in the western world) are very concerning, with a large number of students failing to progress each year. It is well acknowledged that a significant factor of this attrition, is the students’ difficulty to master the introductory programming module, often referred to as CS1.

Objective: The objective of this article is to describe the evolution of a prediction model named PreSS (Predict Student Success) over a 13-year period (2005–2018).

Method: This article ties together, the PreSS prediction model; pilot studies; a longitudinal, multi-institutional re-validation and replication study; improvements to the model since its inception; and interventions to reduce attrition rates.

Findings: The outcome of this body of work is an end-to-end real-time web-based tool (PreSS#), which can predict student success early in an introductory programming module (CS1), with an accuracy of 71%. This tool is enhanced with interventions that were developed in conjunction with PreSS#, which improved student performance in CS1.

Implications: This work contributes significantly to the computer science education (CSEd) community and the ITiCSE 2015 working group’s call (in particular the second grand challenge), by re-validating and developing further the original PreSS model, 13 years after it was developed, on a modern, disparate, multi-institutional data set.     

How autonomy support mediates the relationship between self-efficacy and approaches to learning

Abstract

The significant interplay between self-efficacy, autonomy support and approaches to learning in adolescent students is widely recognized. However, less is known about whether substantial differences exist between early and middle adolescent students from schools with different environments. To close this research gap, this study used latent mean comparison and multigroup structural equation modeling with questionnaire data from a sample of German adolescent students (N?=?1153; M_AgeT1?=?13.97, SD = 1.37; M_AgeT2?=?14.27, SD = 1.25) in two waves. Multigroup structural equation modeling reveals that autonomy functions as a mediator in the association between self-efficacy and approaches to learning only for students from schools with a student-centered learning environment based on competence-matrices in contrast to a teacher-directed learning environment, particularly for early adolescent students. More specifically, adolescents’ approaches to learning can be enhanced through autonomy-supportive learning independently of their self-efficacy.     

Improved Social Communication Abilities and Reduced Autism Severity in Children with Autism Spectrum Disorder and Highly Sensitive Mothers

SYNOPSIS

Objective . To explore whether maternal sensitivity is associated with Autism Spectrum Disorder (ASD) severity in children with and without ASD. Design . The samples consisted of 25 Mexican dyads of children with ASD (aged 3.1-6.9 years) and their mothers (aged 20-47 years) and 24 Mexican dyads of children without ASD (aged 3.4-6.7 years) and their mothers (aged 24-45 years). Maternal sensitivity and ASD severity symptoms were scored from 2-h videos of mother-child daily interactions. Results . A between-group comparison showed a trend toward less severe ASD in children with highly sensitive mothers, specifically in the Nonverbal Communication subdomain. Conclusions . Greater maternal sensitivity is associated with improved social ability in children with ASD.     

Knowledge of secondary school pupils regarding sexual health education

Objective: To assess the sexual health knowledge of secondary school pupils in order to ascertain whether the current government public health and education policies are having any impact on pupils' sexual health.

Design: Results obtained from a questionnaire as part of a two‐phase intervention study.

Setting: Nineteen mixed‐sex, state secondary schools in central England.

Participants: Year 8 pupils (350 male, 345 female), year 9 pupils (300 male, 325 female) and year 10 pupils (310 male, 329 female).

Intervention: A questionnaire survey to assess the knowledge of pupils' sexual health education.

Main outcome measures: Questionnaires distributed to pupils as baseline to assess their knowledge of sexual health, contraception and sexually transmitted infections.

Results: Sexual health knowledge improves with age. A significant difference across all age groups was found, although knowledge regarding sexually transmitted infections and emergency contraception is poor for all age groups.

Conclusions: Current sexual health education provision is not providing young people with adequate knowledge regarding sexual health and contraception.     

一矩阵方程组的反射解

We derive necessary and sufficient conditions for the existence and an expression of the （anti）reflexive solution with respect to the nontrivial generalized reflection matrix P to the system of complex matrix equations AX = B and XC = D. The explicit solutions of the approximation problem min x∈Ф ｜｜X - E｜｜F was given, where E is a given complex matrix and Ф is the set of all reflexive （or antireflexive） solutions of the system mentioned above, and ｜｜·｜｜ is the Frobenius norm. Furthermore, it was pointed that some results in a recent paper are special cases of this paper.     

Concepts before coding: non-programming interactives to advance learning of introductory programming concepts in middle school

ABSTRACT

Background and Context: Learners struggle with conceptual understanding of introductory programming concepts such as variables, expressions, and loops.

Objective: We examine whether and how designed activities for conceptual exploration support preliminary engagement with and learning of foundational and often hard-to-grasp programming concepts for students in grades 6–8.

Method: Drawing on principles from dynamic mathematics, we developed a suite of non-programming digital and unplugged activities embedded in a curriculum before students engage in Scratch block-based programming. We conducted empirical research in three middle school classrooms in diverse urban US schools and examined student performance through mixed qualitative and quantitative methods.

Findings: Learning gains were significant and not predicted by grade, gender or prior academic preparation. Free-choice projects of students showed statistically greater (correct) use of key concepts compared to those not in the study.

Implications: Our work demonstrates the promise of novel approaches such as interactive non-programming activities for deeper understanding of programming concepts.     

Review: Approaches to educational psychology‐some recent textbooks

Blair, G. M., Jones, R. S., and Simpson, R. H., Educational Psychology (4^th Ed.). New York: Macmillan, 1975. 624 pages. $8.95

Craig, R. C., Mehrens, W. H., and Clarizio, H. F., Contemporary Educational Psychology: Concepts, Issues, Applications. New York: Wiley, 1975. 558 pages. $9.95

Gage, N. L., and Berliner, D. C., Educational Psychology. Chicago: Rand McNally, 1975. 869 pages. $9.95

Lefrancois, G., Psychology for Teaching (2nd Ed.). Belmont, Cal.: Wadsworth, 1975. 372 pages. $7.95

Packard, R. G., Psychology of Learning and Instruction. Columbus, Ohio: Merrill, 1975. 480 pages. $9.95

Smith, M. D., Educational Psychology and its Classroom Applications. Boston: Allyn & Bacon, 1975. 574 pages. $9.95     

Using an adaptive expertise lens to understand the quality of teachers’ classroom implementation of computer-supported complex systems curricula in high school science

Background: This exploratory study is part of a larger-scale research project aimed at building theoretical and practical knowledge of complex systems in students and teachers with the goal of improving high school biology learning through professional development and a classroom intervention.

Purpose: We propose a model of adaptive expertise to better understand teachers’ classroom practices as they attempt to navigate myriad variables in the implementation of biology units that include working with computer simulations, and learning about and teaching through complex systems ideas.

Sample: Research participants were three high school biology teachers, two females and one male, ranging in teaching experience from six to 16 years. Their teaching contexts also ranged in student achievement from 14–47% advanced science proficiency.

Design and methods: We used a holistic multiple case study methodology and collected data during the 2011–2012 school year. Data sources include classroom observations, teacher and student surveys, and interviews. Data analyses and trustworthiness measures were conducted through qualitative mining of data sources and triangulation of findings.

Results: We illustrate the characteristics of adaptive expertise of more or less successful teaching and learning when implementing complex systems curricula. We also demonstrate differences between case study teachers in terms of particular variables associated with adaptive expertise.

Conclusions: This research contributes to scholarship on practices and professional development needed to better support teachers to teach through a complex systems pedagogical and curricular approach.     

Learning outdoors or with a computer: the contribution of the learning setting to learning and to environmental perceptions

ABSTRACT

Background: Outdoor learning and computer-based learning are two different alternatives to in-class conventional teacher-centered learning.

Purpose: This study compares the outdoor learning setting with computer-based learning in class. It examines the influence of the two different learning settings on academic achievements, the learning experience, and pro-environmental perceptions.

Sample: A total of 90 elementary school students (third and fourth-grade classes) participated in the study.

Design and methods: The academic knowledge of the study participants was tested through identical exams for both learning settings. In addition, in each group the students’ perceptions were examined by means of a questionnaire about environmental values and the learning experience.

Results: The study demonstrates that academic achievements in the two settings were similar, but the students expressed more enthusiasm about the outdoor learning experience than about in-class learning. In addition, the outdoor learning setting contributed more to promoting positive environmental perceptions even though students did not learn directly about environmental issues and sustainability.

Conclusions: These findings suggest that learning in the natural environment is valuable: Alongside the fostering of computerized learning, it is also important to promoteoutdoor learning settings and integrate both settings by implementing mobile technologies in the outdoor teaching.     

Student leadership in small group science inquiry

Background: Science educators have sought to structure collaborative inquiry learning through the assignment of static group roles. This structural approach to student grouping oversimplifies the complexities of peer collaboration and overlooks the highly dynamic nature of group activity.

Purpose: This study addresses this issue of oversimplification of group dynamics by examining the social leadership structures that emerge in small student groups during science inquiry.

Sample: Two small student groups investigating the burning of a candle under a jar participated in this study.

Design and method: We used a mixed-method research approach that combined computational discourse analysis (computational quantification of social aspects of small group discussions) with microethnography (qualitative, in-depth examination of group discussions).

Results: While in one group social leadership was decentralized (i.e., students shared control over topics and tasks), the second group was dominated by a male student (centralized social leadership). Further, decentralized social leadership was found to be paralleled by higher levels of student cognitive engagement.

Conclusions: It is argued that computational discourse analysis can provide science educators with a powerful means of developing pedagogical models of collaborative science learning that take into account the emergent nature of group structures and highly fluid nature of student collaboration.     

Reordering and Reflecting Factors for Simulation Studies With Exploratory Factor Analysis

This article describes the REREFACT R package, which provides a postrotation algorithm that reorders or reflects factors for each replication of a simulation study with exploratory factor analysis (EFA). The purpose of REREFACT is to provide a general algorithm written in freely available software, R, dedicated to addressing the possibility that a nonuniform order or sign pattern of the factors could be observed across replications. The algorithm implemented in REREFACT proceeds in 4 steps. Step 1 determines the total number of equivalent forms, I, of the vector of factors, η. Step 2 indexes, i = 1, 2 … I, each equivalent form of η (i.e., ηⁱ) via a unique permutation matrix, P (i.e., Pⁱ). Step 3 determines which ηⁱ each replication follows. Step 4 uses the appropriate Pⁱ to reorder or re-sign parameter estimates within each replication so that all replications uniformly follow the order and sign pattern defined by the population values. Results from two simulation studies provided evidence for the efficacy of the REREFACT to identify and remediate equivalent forms of η in models with EFA only (i.e., Example 1) and in fuller parameterizations of exploratory structural equation modeling (i.e., Example 2). How to use REREFACT is briefly demonstrated prior to the Discussion section by providing annotations for key commands and condensed output using a subset of simulated data from Example 1.     

Teaching Teachers

Abstract

Women Against the Odds The Campus Troublemakers: Academic Women In Protest By Athena Theodore Houston: Cap and Gown Press, 1986 xxiv + 293 pages, $23.95 hardbound, $15.95 softbound. Reviewed by Claire Hirshfield

“Artistry of Discussion Leadership” and Other Skills Teaching and the Case Method By C. Roland Christensen, with Abby J. Hansen Boston: Harvard Business School, 1987, 290 pages, $29.95 Reviewed by Richard Leahy

Valuable Background Reading College: The Undergraduate Experience in America By Ernest L. Boyer, president, The Carnegie Foundation for the Advancement of Teaching New York: Harper &; Row, 1987, 328 pages, $19.95 Reviewed by Frederick S. Weaver     

Remarkable rate acceleration of SmI3-mediated iodination of acetates of Baylis-Hillman adducts in ionic liquid： facile synthesis of （Z）-allyl iodides

Stereoselective transformation of Baylis-Hillman acetates I into corresponding （Z）-allyl iodides 2 has been achieved by treatment of I with samarium triiodide in THF. Remarkable rate acceleration of samarium triiodide-mediated iodination of 1 was found when ionic liquid 1-n-butyl-3-methyl-imidazolium tetrafluroborate （[bmim]BF4） was used as reaction media in stead of THF. This novel approach proceeds readily at 50 ℃ within a few minutes to afford （Z）-allyl iodides 2 in excellent yields. A mechanism involving stereoselective iodination of the acetates of Baylis-Hillman adducts by samarium triiodide is described, in which a six-membered ring transition state played a key role in the stereoselective formation of 2.     

‘It didn’t really change my opinion’: exploring what works,what doesn’t and why in a school science,technology, engineering and mathematics careers intervention

Background: It is widely agreed that more needs to be done to improve participation in science, technology, engineering and mathematics (STEM). Despite considerable investment in interventions, it has been difficult to discern their effectiveness and/or impact on participation.

Purpose: This paper discusses findings from a six-week pilot STEM careers intervention that was designed and overseen by a teacher from one London girls’ school. We reflect on the challenges for those attempting such interventions and the problems associated with evaluating them.

Sample: Data were collected from Year 9 students (girls aged 13–14 years) at the school.

Design and methods: Pre- and post-intervention surveys of 68 students, classroom observations of intervention activities, three post-intervention discussion groups (five or six girls per group) and a post-intervention interview with the lead teacher were conducted.

Results: Although the intervention did not significantly change students’ aspirations or views of science, it did appear to have a positive effect on broadening students’ understanding of the range of jobs that science can lead to or be useful for.

Conclusions: Student aspirations may be extremely resistant to change and intervention, but students’ understanding of ‘where science can lead’ may be more amenable to intervention. Implications are discussed, including the need to promote the message that science is useful for careers in and beyond science, at degree and technical levels.     

A theory of instruction for introductory programming skills

ABSTRACT

Background and Context: Current introductory instruction fails to identify, structure, and sequence the many skills involved in programming.

Objective: We proposed a theory which identifies four distinct skills that novices learn incrementally. These skills are tracing, writing syntax, comprehending templates (reusable abstractions of programming knowledge), and writing code with templates. We theorized that explicit instruction of these skills decreases cognitive demand.

Method: We conducted an exploratory mixed-methods study and compared students’ exercise completion rates, error rates, ability to explain code, and engagement when learning to program. We compared material that reflects this theory to more traditional material that does not distinguish between skills.

Findings: Teaching skills incrementally resulted in improved completion rate on practice exercises, and decreased error rate and improved understanding of the post-test.

Implications: By structuring programming skills such that they can be taught explicitly and incrementally, we can inform instructional design and improve future research on understanding how novice programmers develop understanding.     

African American perspectives on racial disparities in child removals

BackgroundAfrican American children are overrepresented in foster care at twice to three times the rate of white children. Scholars argue that racism and oppression underlie disproportionality (Križ & Skivenes, 2011).ObjectiveThis study explored disproportionality as seen through the eyes of African American parents in the child welfare system. The aim was to understand why African American families are over-represented in child custody statistics and to improve family and parenting support for African American communities.Participants & SettingParticipants included twenty-one African Americans--12 women and 9 men, two of whom were foster parents and 19 of whom were parents involved with child welfare services. All participants reside in two impoverished areas in southern United States. Focus groups were used to collect data and were conducted at a community center.MethodsThe method of analysis was constant comparison analysis (Strauss) and thematic analysis of the focus group discussions in the context of institutional policy.FindingsSix themes (profound lack of trust; overwhelming trauma; severe and persistent poverty; health and mental health; socio-economic conditions; and sense of social isolation were identified, along with three participant suggestions to improve child welfare services (family support services, economic revival, and better communication).ConclusionsIn the current study we note the strong link between poverty, child maltreatment, and child removal and conclude with an exploration of practice and policy implications with recommendations for a way forward. The need for culturally competent and trauma informed child welfare services is also discussed.     

The potential for developing educational farms: a SWOT analysis from a case study

ABSTRACT

Purpose: Educational farms (EFs) serve a number of social and economic functions and are part of the debate about new learning environments, multifunctional agriculture and firm diversification. Through the analysis of a case study, this paper aims to identify strengths and weaknesses, opportunities and threats (SWOT) of EFs and key factors for setting a development strategy.

Design/Methodology/Approach: A direct survey to EFs in Molise region (IT) was implemented during April-May 2017 and results were assessed following a SWOT approach.

Findings: Strong motivation and connection with agritourism activities are strengths of EFs in the region; small size, unskilled staff, lack of structured educational pathways, and limited profitability are the main weaknesses. Farms opportunities come from a territory rich in rural landscapes, environmental resources, and typical food products, and from a growing demand for educational tourism. Obstacles are in the institutional sphere and due to the absence of regional networks. Based on SWOT findings, key factors for EFs development are discussed.

Practical implications: EFs development requires innovative educational and managerial tools, a more concerted and proactive role for multiple stakeholders, and the implementation of a network approach. Study findings solicit actions from public institutions and advisory services to improve farmers’ skills.

Theoretical implications: The paper contributes to the theoretical debate about the need for a multidisciplinary approach in dealing with the analysis of EFs.

Originality/Value: The analysis underlines the importance of internal and external drivers in stimulating farms and institutions to support diversification strategies, rural development and transformation processes in inner areas.     

On the supranational spell of PISA in policy

Abstract

Background: PISA results appear to have a large impact upon government policy. The phenomenon is growing, with more countries taking part in PISA testing and politicians pointing to PISA results as reasons for their reforms.

Purpose: The aims of this research were to depict the policy reactions to PISA across a number of jurisdictions, to see whether they exhibited similar patterns and whether the same reforms were evident.

Sources of evidence: We investigated policy and media reactions to the 2009 and 2012 PISA results in six cases: Canada, China (Shanghai), England, France, Norway and Switzerland. Cases were selected to contrast high-performing jurisdictions (Canada, China) with average performers (England, France, Norway and Switzerland). Countries that had already been well reported on in the literature were excluded (Finland, Germany).

Design and methods: Policy documents, media reports and academic articles in English, French, Mandarin and Norwegian relating to each of the cases were critically evaluated.

Results: A policy reaction of ‘scandalisation’ was evident in four of the six cases; a technique used to motivate change. Five of the six cases showed ‘standards-based reforms’ and two had reforms in line with the ‘ideal-governance’ model. However, these are categorisations: the actual reforms had significant differences across countries. There are chronological problems with the notion that PISA results were causal with regard to policy in some instances. Countries with similar PISA results responded with different policies, reflecting their differing cultural and historical education system trajectories.

Conclusions: The connection between PISA results and policy is not always obvious. The supranational spell of PISA in policy is in the way that PISA results are used as a magic wand in political rhetoric, as though they conjure particular policy choices. This serves as a distraction from the ideological basis for reforms. The same PISA results could motivate a range of different policy solutions.     

Girls and science education in Mauritius: a study of science class practices and their effects on girls

Background: The population of Mauritius consists of 52% females and scientific literacy is seen to be of vital importance for all young people if they are to be sufficiently equipped to meet the challenges of a fast changing world. Previous research shows, however, that science is not popular among girls. This paper explores one of many reasons why few girls opt for science subjects after compulsory schooling.

Purpose: This study investigated the approaches to teaching in four science classrooms in Mauritius, with particular emphases on the preferences of girls as they learn science.

Sample: A total of 20 student interviews and 16 teacher interviews were conducted in four schools in Mauritius. The four mixed-faith schools comprised two all-girl schools (one state, one fee-paying), and two mixed-sex schools (one state, one fee-paying), within urban, suburban and rural situations.

Design and method: 80 non-participant lessons were observed, of which 60 were science lessons while the remaining 20 non-science lessons were in economics, accounts and commerce. Group interviews with five pupils in each of the four schools were conducted and 16 individual interviews with teachers in the four schools gave an insight into the pedagogic approaches used for the teaching and learning of science.

Results: Transmissive approaches to teaching, giving little opportunity for collaborative or activity-based learning, were found to be the most important factors in alienating the girls from science.

Conclusions: There need to be radical changes in approaches to teaching to retain young girls’ interest in the sciences.